TY - JOUR AU - È. M. Belenov AU - A. N. Oraevsky TI - Radiation conditions of a gas laser with annular cavity JO - Doklady Akademii Nauk PY - 1968 SP - 56 EP - 58 VL - 180 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1968_180_1_a14/ LA - ru ID - DAN_1968_180_1_a14 ER -